Steam-generating apparatus.



J. F. DORNFELD. STEAM GENERATING APPARATUS.

APPLICATION HLED MAY13, 1914.

Patented Feb. 19, 1918.

2 SHEETS-SHEET I INVENTOR, J 6? l A WD.OFO/ Q/J ATTORNEY WITNESSES J. F.DORNFELD. STEAM GENERATING APPARATUS.

1,256,77 APPLICATION FILED MAY 13. 1914. 19,

2 SHEETS-SHEET 2.

WITNESSES INVENTOR 4 7 Fjm n/e/J 0% ATTORNEY JOHN F. DOBNFELD, OFCHICAGO, ILLINOIS,

STEAM-GENERATING APPARATUS.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed May 13, 1914. Serial No. 838,249.

To all whom it may concern Be it known that 1, JOHN F. DoRNrELn,

I citizen of the United States, residing at Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Steam-Generating Apparatus; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same. 1

This invention has for its object to provide an improved steamgenerating apparatus, and consists in the features of construction andcombinations of parts hereinafter fully described and claimed.

In the accompanying drawings illustrating the invention:

Figure 1 is a view of a steam generating apparatus embodying myinvention showing the boiler in side elevation and the setting andfurnace therefor in central vertical longitudinal section.

' Fig. -2 is a vertical transverse section on the line 22 of Fig. -1.

Fig. -3 is a rear end elevation of the apparatus.

My invention includes an improvement in boilers per se and relatesparticularly to that class of boilers known as water-tube or as combinedwater-tube and flue boilers and has for its main object to provide aboiler of this type which is more durable than those now generally usedand which affords the advantage of enabling the same to be more readilyhandled in shipping and setting than is usually possible with boilers ofthis type.

A further object of theinve'ntion is to provide a boiler-settingincluding the boilerfurnace so arranged and constructed relatively tothe boiler as to cause the greatest heat to be applied to that part ofthe boiler in which, normally, the coldest water is located and in whichthe hot products of combustion follow the travel of the water from thispoint to a point in the boiler from which the same returns to theinitial point, and in which, during travel of such hot products ofcombustion, the latter are caused to be so distributed at frequentintervals as to be brought into the most efficient relation to theheatingsurfaces to effect absorptionof heat by the water before itsentry from the water tubes and boxes into the boiler shell.

A further object of the invention is to economize space occupied by theboiler with out effecting diminution of effective heating surface.

Referring now to the drawings, 1 indicates a cylindrical boiler shell ofordinary construction equipped with flues 2 in the usual manner. To thefront and rear end portions of said shell 1 are secured water boxes 3and 4 respectively, each thereof being provided at its mouth with aperipheral flange 5 secured to the bottom of the boiler by riveting orother well-known means, the opening in the boiler shell establishingcommunication between the same and the water box being preferably ofshape and size substantially coincident with the mouth of the water boxconnecting therewith.

Connecting the water boxes 3 and 4 are the inclined water tubes 6whereby under the influence of heat, circulation is established from thewater box 3 to the water box 4 I thence through the boiler shell andback to the water box 3. Said water box 4 is provided with flues 7 abovethe level of the water tubes 6 for the passage of the hot products ofcombustion.

The setting for the boiler comprises the usual side walls 8 of masonryupon which the boiler shell is supported in any wellknown manner. In theinstance illustrated the forward end portion of the boiler shell issuspended by means of rods 9 from a pair of parallel channel bars 10spanning the side walls 8. The rear water box 3 is supported upon theend wall 11 of the boiler furnace which extends between said side walls8 contiguous to the rear ends of the latter.

The boiler furnace comprises the usual fire chamber 12 equipped with agrate 13 and terminating in a bridge wall 14 upon which and said frontwall said grate 13 is supported. Above the grate 13 and extending fromthe front wall to a point substantially vertically alined with thebridge wall is the usual arch 15 above which the water box 4: isdisposed. Between the bridge wall 1 1 and the rear wall 11 of thefurnace is a transverse arch 16 which supports the boiler tubes 6between their ends, and which also partially supports a battle wall 17consisting of fire brick or tile disposed between and carried by thelower row of boiler tubes 6, and which extends from approximately therear end portion of the arch 15 to a point above and slightly rearwardlyof-the-arch 16.

The hot products of combustion pass from the fire chamber over thebridge wall 14 under the arch 16, through the interstices between thetubes 6, above the bafiie wall 17, through the fiues 7 in the forwardwater box 4, and also through the space 18 between the lower end of thefire box and the arch 15, and through the space between the lower halfof the boiler shell 1 and the side walls 8 into and through the fiues 2to the chimney flue 19. o

It will be noted that the said hot gases or hot products of combustionfirst strike. the

water tube 6 between the baffle wall 17 and V the rear water box 3, andthen pass substantially parallel with the said tubes 6 and between thelatter, being gradually distributed as they move toward the forward endof the boiler shell 1 whence they passin a substantially uniformlydistributed manner through the tines 2 to the chimney flue 19. Thus thesaid products of combustion first strike the boiler tube 6 at the pointwhere the coldest water would naturally be found and move in thedirection of flow of the water, and in eflicient heating relation to thetubes 6 as well as the boiler shell and then strike the front water box4 and in passing through the flues therein again come into substantiallyintimate heating relation to the water before it passes into the shell 1and again in passingthrough the fiues 2 so that the most intense heatfollows the coldest water from its normal position in the boiler to itsdelivery into the boiler shell and obviously again toward the rear ofthe boiler where the water again passes into the box 3 and thus againthrough the tubes 6'.

I am aware that boiler furnaces and settings substantially identicalwith What. I have shown and described are not, per se, novel but it willbe apparent that the style and construction of the boiler can be mostefficient only in combination with a furnace and setting by means ofwhich the hot products of combustion are caused to travel as described;My said invention, therefore, resides particularly in the novel featuresof construction of the boiler and to the extent indicated to the furnaceand setting in combination with the particular improvements in theboiler. i

' The particular advantages resulting from the improvements are:Firstthat the water tubes are shorter than in most boilers of a similartype but the loss in potential heating surface resulting therefrom ismade up by the fiues 7 in the water box 41, thus enabling me toeconomize in the amount of space occupied without loss of heatingsurface. Second-the most eifective heating surfaces are maintainednearer thesource of heat and the portion of the boiler normallycontaining the coldest water whereby effective heat absorption ispromoted to the end that the water in the boxes 3 and 4 and tubes 6 maybe very rapidly heated so as to be delivered into the shell at thehighest possible temperature. Third+the products of combustion are morethoroughlv subdivided and distributed so that they may most effectivelyact on all heating surfaces. Fourththe economy in space and greaterstrength resulting from direct attachment or both water boxes to theboiler shell and also resulting from shorter water tubes renders theboiler more easily handled in manufacture, shipment and setting andobviates the necessity of expensive temporary bracing to prevent iniuryduring these operations.

I claim as myinvention:

1. A steam generator comprising a horizontal flue boiler, a pair ofwater legs depending from opposite ends thereof, watertubes connectingsaid water legs, a furnace including a grate, an arch above the same,there beinga passage for products of combustion between the upper faceof the arch and the lower end of one of the water legs, a beam spanningthe side walls of the furnace,

and tension'rods supporting one end of the boiler on said beam, thewaterlegat the other end of the boiler supported on the rear wall of thefurnace.

2. A steam generator comprising a'horizontal flue boiler, a pair ofwater legs de pending from opposite ends thereof watertubes connectingsaid water legs, a plurality of fines in the forward water legcontiguous to the underside of the boiler, a furnace including a grate,an arch above the same,

there being a passage for products of com I bustion between the upperface of the arch and thelower end of one of the waterlegs, a beamspanningthe side walls of the furnace, and tension rods supporting oneend of the boiler on said beam, the water leg at rear wall of thefurnace. c 3. A steam generator comprising a llOIlthe other end of (heboiler supported on the "zontal flue boiler, a forward'and a rear waterleg depending therefrom, water-tubes connecting said water legs, afurnace including a grate beneath the forward end of the boiler, an archabove the grate and extending rearwardly beneath the forward water leg,the rear end ofthe boiler supported on the rear wall of the furnace, andname in presence of two subscribing wittefnslilonbmieans slilpplortlingthe (ii'orfvafld 2nd nesses. ote oierwit teoweren oteor- 4 Ward Waterleg free of said arch and provid- JOHN DORNFELD' 5 ing a passagetherebenween for the products Witnesses:

of combustion. M. M. BOYLE,

In testimony whereof I have signed my G. M. NEVILLE.

Copies 0 this patent may be obtained for five cents each, by addressingthe Commissioner of Eatents,

' Washington, Da 0.

